The 05 has 52,000. I have 4 polk audio speakers replacing the stock speakers and are powered by a kicker 250 4 channel amp. The passenger side front speaker blew so that needs replaced. I believe a sub would have solved this problem. When left in cold weather all interior and exterior lights flash when being started in the cold. If the headlights are turned on they flash too. If it is really cold the speakers will shut off almost like it's losing power. We have an aftermarket head unit. My father installed this all by himself because he thought he could save some money. Now I'm on my own its my problem now. What could it be and what will solve the problem? Thanks guys.